Milwaukee zoo officials investigate gorilla deaths

MILWAUKEE — Officials at Milwaukee County Zoo are trying to determine whether the recent deaths of two of the zoo's gorillas are related.

WITI-TV reports the zoo's other gorillas weren't on exhibit Wednesday. Zoo officials announced the death Monday of Naku, a 17-year-old Western lowland gorilla. Her partner, a 31-year-old gorilla named Cassius, died earlier in April.

Zookeepers noticed Naku appeared more tired than normal. She was found to be septic, and emergency surgery showed a portion of her intestine had died. She was euthanized.